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Quarterly Financial Data (Tables) | 12 Months Ended
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May 31, 2012
Quarterly Financial Data (Unaudited) [Abstract] |
Quarterly Financial Data (Unaudited) |
|  | Three Months Ended |  |  |  |
Fiscal 2012 |  | August 31 |  |  | November 30 |  |  | February 29 |  |  | May 31 |  |  | Full Year |
Service revenue |  |  | 552.0 |  |  |  | 535.0 |  |  | $ | 558.5 |  |  | $ | 540.7 |  |  | $ | 2,186.2 |
Interest on funds held for clients |  |  | 11.1 |  |  |  | 10.7 |  |  |  | 11.0 |  |  |  | 10.8 |  |  |  | 43.6 |
Total revenue |  |  | 563.1 |  |  |  | 545.7 |  |  |  | 569.5 |  |  |  | 551.5 |  |  |  | 2,229.8 |
Operating income |  |  | 229.7 |  |  |  | 217.9 |  |  |  | 210.4 |  |  |  | 195.9 |  |  |  | 853.9 |
Investment income, net |  |  | 1.5 |  |  |  | 1.5 |  |  |  | 1.6 |  |  |  | 1.8 |  |  |  | 6.4 |
Income before income taxes |  |  | 231.2 |  |  |  | 219.4 |  |  |  | 212.0 |  |  |  | 197.7 |  |  |  | 860.3 |
Income taxes |  |  | 82.3 |  |  |  | 79.0 |  |  |  | 76.6 |  |  |  | 74.4 |  |  |  | 312.3 |
Net income |  | $ | 148.9 |  |  | $ | 140.4 |  |  | $ | 135.4 |  |  | $ | 123.3 |  |  | $ | 548.0 |
Basic earnings per share (1) |  | $ | 0.41 |  |  | $ | 0.39 |  |  | $ | 0.37 |  |  | $ | 0.34 |  |  | $ | 1.51 |
Diluted earnings per share (1) |  | $ | 0.41 |  |  | $ | 0.39 |  |  | $ | 0.37 |  |  | $ | 0.34 |  |  | $ | 1.51 |
Weighted-average common shares outstanding |  |  | 362.2 |  |  |  | 362.4 |  |  |  | 362.5 |  |  |  | 362.6 |  |  |  | 362.4 |
Weighted-average common shares outstanding, assuming dilution |  |  | 362.8 |  |  |  | 362.8 |  |  |  | 363.1 |  |  |  | 363.4 |  |  |  | 363.0 |
Cash dividends per common share |  | $ | 0.31 |  |  | $ | 0.32 |  |  | $ | 0.32 |  |  | $ | 0.32 |  |  | $ | 1.27 |
Total net realized gains (2) |  | $ | 0.1 |  |  | $ | 0.1 |  |  | $ | 0.4 |  |  | $ | 0.4 |  |  | $ | 1.0 |
|  | Three Months Ended |  |  |  |
Fiscal 2011 |  | August 31 |  |  | November 30 |  |  | February 28 |  |  | May 31 |  |  | Full Year |
Service revenue |  |  | 506.2 |  |  |  | 500.0 |  |  | $ | 519.6 |  |  | $ | 510.4 |  |  | $ | 2,036.2 |
Interest on funds held for clients |  |  | 12.1 |  |  |  | 12.0 |  |  |  | 11.7 |  |  |  | 12.3 |  |  |  | 48.1 |
Total revenue |  |  | 518.3 |  |  |  | 512.0 |  |  |  | 531.3 |  |  |  | 522.7 |  |  |  | 2,084.3 |
Operating income |  |  | 200.8 |  |  |  | 203.9 |  |  |  | 198.9 |  |  |  | 182.8 |  |  |  | 786.4 |
Investment income, net |  |  | 1.4 |  |  |  | 1.5 |  |  |  | 1.5 |  |  |  | 1.4 |  |  |  | 5.8 |
Income before income taxes |  |  | 202.2 |  |  |  | 205.4 |  |  |  | 200.4 |  |  |  | 184.2 |  |  |  | 792.2 |
Income taxes |  |  | 70.3 |  |  |  | 71.5 |  |  |  | 69.8 |  |  |  | 65.3 |  |  |  | 276.9 |
Net income |  | $ | 131.9 |  |  | $ | 133.9 |  |  | $ | 130.6 |  |  | $ | 118.9 |  |  | $ | 515.3 |
Basic earnings per share (1) |  | $ | 0.36 |  |  | $ | 0.37 |  |  | $ | 0.36 |  |  | $ | 0.33 |  |  | $ | 1.42 |
Diluted earnings per share (1) |  | $ | 0.36 |  |  | $ | 0.37 |  |  | $ | 0.36 |  |  | $ | 0.33 |  |  | $ | 1.42 |
Weighted-average common shares outstanding |  |  | 361.6 |  |  |  | 361.7 |  |  |  | 361.8 |  |  |  | 362.0 |  |  |  | 361.8 |
Weighted-average common shares outstanding, assuming dilution |  |  | 362.0 |  |  |  | 362.1 |  |  |  | 362.6 |  |  |  | 363.0 |  |  |  | 362.4 |
Cash dividends per common share |  | $ | 0.31 |  |  | $ | 0.31 |  |  | $ | 0.31 |  |  | $ | 0.31 |  |  | $ | 1.24 |
Total net realized gains (2) |  | $ | 0.1 |  |  | $ | 0.2 |  |  | $ | 0.1 |  |  | $ | 0.9 |  |  | $ | 1.3 |
(1) | Each quarter is a discrete period and the sum of the four quarters’ basic and diluted earnings per share amounts may not equal the full year amount.
(2) | Total net realized gains on the combined funds held for clients and corporate investment portfolios.

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 270 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (a)-(j) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6952194&loc=d3e1280-108306 + Details
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